package com.hmall.interceptor;

import com.hmall.context.BaseContext;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class TokenUserInterceptor implements HandlerInterceptor {
    /**
     * 在Controller方法执行之前执行
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取userId
        String userId = request.getHeader("authorization");

        //2、校验令牌
        if(userId!= null && !"".equals(userId)) {
            log.info("当前用户id：{}", userId);
            BaseContext.setCurrentId(Long.valueOf(userId));
            //3、通过，放行
            return true;
        } else {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
